Mudshark is cool. He's fast-thinking and fast-moving, and with his photographic memory, He's the go-to guy with the answers. At least, he was until the Psychic Parrot takes up residence in the school library. The word in school is that the parrot can out-think Mudshark. There's an escaped gerbil running the halls' a near-nuclear emergency in the faculty restroom, and an unexplained phenomenon involving disappearing erasers.